Thin heat sink structure

Abstract

A thin heat sink structure includes a housing and at least one heat dissipation plate. The housing is assembled from a first housing portion and a second housing portion and is formed therein with a receiving space. The heat dissipation plate is provided in the receiving space and is formed with at least one hollow flow channel by stamping. The flow channel is in communication with the first housing portion and the second housing portion. Two heat dissipation plates can be stacked in the receiving space in such a way that the two flow channels are linearly or angularly offset with respect to and overlap each other, and that the overlapping portions of the two flow channels form a hollow portion in communication with the two housing portions. The thin heat sink structure can be made into a large heat sink with high heat dissipation efficiency.

What is claimed is: 
     
         1 . A thin heat sink structure, comprising:
 a housing comprising and assembled from a first housing portion and a second housing portion, the housing being formed therein with a receiving space; and   at least one heat dissipation plate provided in the receiving space, the heat dissipation plate being formed with at least one hollow flow channel in communication with the first housing portion and the second housing portion.   
     
     
         2 . The thin heat sink structure of  claim 1 , wherein there are at least two said heat dissipation plates, and the two heat dissipation plates are stacked in the receiving space in such a way that the flow channel of one of the heat dissipation plates is linearly or angularly offset with respect to and overlaps the flow channel of the other heat dissipation plate, and that overlapping portions of the two flow channels form a hollow portion in communication with the first housing portion and the second housing portion. 
     
     
         3 . The thin heat sink structure of  claim 2 , wherein the two heat dissipation plates are stacked in such a way that the flow channel of one of the heat dissipation plates is at 90° with (i.e., perpendicular to) or at 180° with (i.e., turned over or upside down with respect to) the flow channel of the other heat dissipation plate. 
     
     
         4 . The thin heat sink structure of  claim 2 , wherein the at least one flow channel of each said heat dissipation plate is one or an arbitrary combination of a continuous back-and-forth wavy-shaped flow channel, a continuous and slanting back-and-forth wavy-shaped flow channel, a plurality of rows of slantingly arranged and spaced-apart H-shaped flow channels, a continuous back-and-forth curvy-shaped flow channel, and a continuous circular spiral-shaped flow channel. 
     
     
         5 . The thin heat sink structure of  claim 1 , wherein the first housing portion is fixedly provided with a plurality of heat dissipation fins, and the second housing portion is joined to a heat source. 
     
     
         6 . The thin heat sink structure of  claim 2 , wherein the flow channel of one of the heat dissipation plates has one end configured as an input end, and the input end is in communication with a through hole of the housing so that a working fluid is able to be input into the input end in order to flow in the flow channels and contact the first housing portion and the second housing portion. 
     
     
         7 . The thin heat sink structure of  claim 6 , wherein the flow channel of the other heat dissipation plate has one end configured as an output end, and the output end is in communication with another through hole of the housing so that the working fluid is able to be output through the output end. 
     
     
         8 . The thin heat sink structure of  claim 7 , wherein the first housing portion is fixedly provided with a plurality of heat dissipation fins, the second housing portion is joined to a heat source, and the input end and the output end are connected to a pump to enable circulation of the working fluid between an interior of the housing and the pump. 
     
     
         9 . The thin heat sink structure of  claim 2 , wherein four said housings are connected to form a vertical structure, and the receiving spaces in the four housings are in communication with one another to form a circulatory heat dissipation loop. 
     
     
         10 . The thin heat sink structure of  claim 1 , wherein the first housing portion, the second housing portion, and the heat dissipation plate are soldered together, and the flow channel of the heat dissipation plate is formed by stamping.